Home / 142,431.15-213,720.99-103,311.18

Finding the Fourth Proportional to 142,431.15, 213,720.99 and 103,311.18

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Solution

The fourth proportional to 142,431.15, 213,720.99 and 103,311.18 is: 155,020.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,431.15 : 213,720.99 = 103,311.18 : x
  2. Step 2: Convert to fraction form
    142,431.15/213,720.99 = 103,311.18/x
  3. Step 3: Cross multiply
    142,431.15x = 213,720.99 × 103,311.18
  4. Step 4: Simplify right side
    142,431.15x = 22,079,767,667.67
  5. Step 5: Solve for x
    x = 22,079,767,667.67/142,431.15
  6. Step 6: Final answer
    x = 155,020.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.